This is mind-boggling information. It is hard to conceive that scientists can create something like this, especially something so small. I was reading a similar article about microelectrode recording. Doctors use microelectrodes to record activity in the human brain.
They also use microelectrodes for microstimulation in certain areas of the brain. It is believed that this process can help alleviate depression. Apparently, they believe it may help with, or at least teach them more about, Parkinson's Disease, too, because they are using this method on patients who have that disease. It is just amazing what scientists and doctors learn every day.